[PATCH] afs: Fix afs_atcell_get_link() to check if ws_cell is unset first

[Edward Adam Davis]

On Tue, 18 Mar 2025 11:20:19 +0000, David Howells wrote:
> Fix afs_atcell_get_link() to check if the workstation cell is unset before
> doing the RCU pathwalk bit where we dereference that.
> 
> Fixes: 823869e1e616 ("afs: Fix afs_atcell_get_link() to handle RCU pathwalk")
> Reported-by: syzbot+76a6f18e3af82e84f264 at syzkaller.appspotmail.com
> Signed-off-by: David Howells <dhowells at redhat.com>
> Tested-by: syzbot+76a6f18e3af82e84f264 at syzkaller.appspotmail.com
> cc: Marc Dionne <marc.dionne at auristor.com>
> cc: linux-afs at lists.infradead.org
> cc: linux-fsdevel at vger.kernel.org
My fix already sent, it is much earlier than your patch.
https://lore.kernel.org/all/tencent_8CA5671E3C533638973237484A0874917609@qq.com/

BR,
Edward